Sewing-machine take-up.



G. B. SEHHOUT. SEWING MACHINE TAKE-:UPI APPLICATION man oc. 2a. ma.'

wim/116%@ G. B. OSTERHGUT.

SEWING MACHINE ,APPUCATION man ocT.2a. 1916.

TAKE-UP.

I I gs- BfosmHouw vsxswuue'mim-InmaTAKE-1W.

APPLICATION FILED 061213.15316.

Mmmm Jam, l5, Nw.

3 SHEETS-SHEET 3.

invitan srarias rarnivar @ARRET B. OSTERI-IOUT, OF PROVIDENCE, REODE ISLAND, .LSSIGNOR T0 WIIALUOX tt ytzIBIBSSEVi/'IN'G MACHINE CO., OF NEW' YORK, N. Y., .A CGPJPORATION OF NEW YORK.

SEWING-MACHINE TAKE-Ul.

LSSS.

Application lez Uetober 23, 1916.

17 0 all fr0/wm t may concern.'

Be it known that l, @ARRET B. OSTER- HOUT, a citizen ot' the United States of America, and a resident of Providence,

Rhode Island, have invented a new and useful Improvement in Sewing-Machine Take- Ups, which invention is fully set forth in the following specilication.

This invention relates to a sewing machine take-up or take-up means, and to such means designed especially to take up the looper threads in the machine known commercially as the VVillcoX & Gibbs Sewing Machine Companys Flatloclr machine;7 shown for example in thelpatent to A.. A. Merritt, No. 1,041,652,y dated October l5, 1912.

The invention consists of an arrangement of take-up parts in the work-arm of the machine in a position relativelynear to the stitch-forming parts Where the slaclrening of the looper threads occurs. rj hus the action of `taking-up the said slack when the loopersstart to enter needle thread loops is not impeded by the Jfriction of pulling the threads through intermediate guides asis the case when the take-up means are located relatively distant from the stitchforming parts, particularly the loopers. Hence, the take-up action is more direct, the looper threads are underbetter control and are more responsive to variations of the tension imposed by tension devices. These and other advantages will be more fully understood from the detailed description and drawings..

`What is noiv believed to be `the preferred embodiment of the invention is illustrated in the accompanying drawings, wherein- Figure 1 is a plan vieivof a sewing machine embodying the invention;

Fig. 2 is an lelevation with parts in section on line 2-2 of Fig. f1;

Fig. 3 is a longitudinal section `through the free end ofthe Work-arm with the parts inside of thearm shown in elevation;

' Figs. 4 and 5 are plan views shovvingfthe looperf mechanism'` and the associated Vlooper Speccation of Letters Patent.

lpatentedfdan. i5, imita.

seiarno. 127,180.

thread take-up means in diEerent positions, respectively;

Fig. G is a transverse section 4onthe `line 6-G oi Fig. 3;

Fig. 7 is a transverse section on theline 7 7 of Fig. l;

Fig. 8 is a detailed perspective vieiv ot the looper-thread take-up parts;

Fig. 9 is a schematic vien showing the path of the looper-threads` through the parts of the machine; and

Fig. l0 comprises four diagrammatic vieivs illustrative of the action ofthelooperthreads at diilerent stages of the elliptical movement of the loopers.

The frame and Work-arm of the machine, including the tivo holloiv standards 40, 41, Fig. l, the hollenT connecting bridge 42 oi' the trainer-the Work-arm including the horizontal part 50, vertically depending part 5l, and the horizontal Work-supporting part Aand Ytree endet thearm 53, with `its removable cover 54,-the thread guide-plate 682,-t1iread tension-plates 684,-bracket 678 on which said guide and tension-plates are mounted,-tlie setof four `thread-guiding hooks 685,--the presser-'foot (part of which shows in Fig. 1),-the needles (Fig.

3),-the'looper-lever or bar 375,*the means (part of which is shown at 410, Fig. 3) for imparting movement in a circularpatli,see dotted circles a', Figs. 4, 5,1to oneend of the looper-lever,-the guide-plate 412 and bridge piece 912 (Fig. 3) between which the "block 418 in vvhich the looper-lever moves longitudinally and Which turns with the lever in the compound movement thereof causing the `points of the loopers to travel ber '340 and the stitclrfeed member 359 i (Fig. 3), respectively,-the ythread `groove or channel 298 (Figs. 4, 5 land 7) in the front Wall of the part 53 of the Worltsarm,

clined portion 705, vertical Vportion 70S, veri tically movable slide 711 having four longitudinal thread grooves and blocks 714 with thread veyes 713 (Fig. 3), and cover 7:23, aresubstantially the saine in consti'uction and functioning as the correspondingly designated parts in Figs. (i6-7 3 ot' said Merritt patent, except that the thread trough hasonly an inclined portion 705 and a vertical portion 7 06 with one bend for the thread where said portions join, and the cover 723 extends f along the inclined portion, whereas in the Y on the end ot' the looper-lever by a patent there is an additional horizontal portion with another bend where it joins the` inclined portion and the cover is on the horizontal portion.

The looper carrier 16 pivotally mounted pivot-- screw 26,-the four loopers 17, and the plate 27 with four thread eyes for the loppei'- threads,-the loop-spreader 29 having a tailpiece 33 pivoted on a screw-pivot 32 and supported by a bracket arin 36,-the roller 37 on tail-piece 33 engaging a cam groove of part 38 on the loopeilever,-and the throat plate or work-platel 1l through which the needles and the feed-members operate-are all siini lar in Vconstruction and functioning to the corresponding parts shown in patent to G.- B.`Osterhout, No. 1.134,483, dated April 6, 1915.

i 77 isa stationary take-up member fitting and adjustable in a longitudinal depression or groove infthe inner *face of the wall of the free end or part 53 of the work-arm. A screw 78 in a countersunk slot in tliefront Wall of the work-arin (Figs. 4- and 5) secures member 77 in its desired position of adjustment, said adjustment determining the degree of take-up action. Two lingers 79, 79 projecting from the outer end of member 77 form an intervening notch in which the looper threads engage. 71 is a movable takeup member secured to the looper-lever 375 by screws 72, 72. A vertical portion of said member has a spring 73 secured thereto by a screw 74 (Fig. 8), the upper end of said spring'resting in a notch 7G between two fingers or lugs projecting horizontally from partg471. AY slight clearance, say o'l'about one tliirty-second of an inch, around the upper end of spring 73, which spring does not contact the wall of notch 7 6,' provides a space through which the looper threads may be entered beneath the spring to the space covered thereby, from which space the threads can not escape during movement of the parts.

edge 53a at the end of said channel, andV j through thethread eyes'vof plate 27 to Vthe Y loopers.

rlhe action upon the looperthreads is diagrammatically illustrated in F ignlO, where@ `in therst view is an approximation-fupon `an abnormal scale ofthe elliptical path traveled by the point of each looper. The second view of Fig. 10 indicates that por tion of the Vlooper inoveii'i'ent duringavhich the itake-up pulls back slack thread. The third View indicates that. portion ofthe looper movement during which Vthe `takeaip gives up slack thread, and fthetourth view that portion of the loopermovemeiit during which there is a .pull off ol thread through the tension plates. c,

Contrasted withV looper-thread 'take-up means such as shown Vin the ,atoresaid flvterritt patent, the take-up ineansfof thisinven-j tion presentthe AVfollowing advantages (a) Moving t the take-up nearer :the loopers, r'e sults in locating between the ftakefup .and tension, threadfangles or turnsjvhich were before located between the take-up and loopg ers. Hence, less stiengtliof pull is required oftake-upin pulling thread back-from the loopei's; alsoA less pressure on the tension platesagaiiist the threadis required to re-v sist thread being pulled through the vtensions rather than bac-k frointhe loopers. .(6) rlhe substitution of the newitake-up means tor the old stiaightensjhe path of-thethread, particularly eliminating one, sharpV `turn (that at thread-guiding hooks of said Merritt patent) Vand Aits vfriction. (c) Because of the lessening ofthe strength of pull required oftakeup,due tothe lessening of the friction of turnsand offtension (or either of same), weaker thread canbe used. (d) The possibilityV of using lighter tension without dangerl of losing control4 of the thread (that is, of pulling thread through the tension rather'than from the loopers), gives better control of ythe setting of the stitches; thatris, control of the amount of looperthread allowedF to go into the stitches on the Aunderside of the fabric, which to a certain extent determines the'V length'` ofY required, but the take-up is positioned at an l;

intermediate point between Vtension devices and loopers, with turns orfriction points distributed on both sidesofthe `take-up. In

other words, there is an approximation of or tendency to balancing, or a more equal balancing, of the friction points on opposite sides of the take-up, on one side between the take-up and loopers, and on the other side between the take-up and tension devices. Variations in the stitch formation are thus much more sensitive to adjustments of the tension devices.

lll/'hat is claimed is 1. In a sewing machine, the combination with an approximately horizontal free-ended work-supporting part of a work-arm, of a looper-lever mounted on said part of the work-arm upon an upright axis and movable longitudinally and also laterally thereon in an approximately horizontal plane, thread-carrying locpers on said lever at one side of its fulcrum, looper-thread talre-up means associated with said lever at the other side of its fulcrum and comprising a member attached to and movable with the lever, and a stationary member' secured to the work-arm, the looper-threads extending from said take-up members in the direction of the lever to the loopers.

' 2. In a sewing machine, the combination with a work-arm having an approximately horizontal hollow free-ended work-supporting part, stitch-forming parts operating at said free end of the work-supporting part of the work-arm and including` thread-carrying loopers, an approximately horizontally disposed looper-lever carrying the loopers at one end thereof movable longitudinally and also fulcrumed to turn laterally on an npright axis intermediate its ends, driving means imparting longitudinal and lateral movements to said lever at its other end, and looper-thread take-up means comprising a movable member attached to and movable with the lever at its driven end and a coperating stationary member attached to the work-arm.

3. In a sewing machine, the combination of a looper-lever mounted to move-longitudinally and laterally in an approximately horizontal plane, a looper or loopers on said lever at one end thereof, driving means imparting movement to the other end of said lever in a Continuous curved path in an approximately horizontal plane, and looperthread take-up means including a movable member attached to and actuated by the lever and a cooperating stationary member.

i. In a. sewing machine, the combination of a work-arm having an approximately horizontal free-ended hollow work-supporting part, a throat-plate thereon, stitch-forming parts including one or more loopers operating within said free end of the workarm, a looper-lever within said hollow worksupporting part of the arm and carrying said looper or loopers, means actuating said lever to impart movement to the looper or looper-s in an elliptical path in an approximately horizontal plane, and looper-thread take-up means including a movable member attached to the lever, and a stationary member, said members cooperatively acting upon the looper -thread to take care of slack therein.

5. In a sewing machine, the combination of a work-arm having an approximately horizontal free-ended hollow work-supporting part, a throat-plate thereon, stitch-forming parts including one or more loopers operating within said free end of the worka 1in, a looper-lever carrying said looper or loopers at one end and movable longitudinally7 and laterally within said arm on an upright fulcrum, means actuating said lever at its other end to impart longitudinal and late `al movement thereto causing the looper or loopers to move in an elliptical path in a plane approximately parallel to the throatplate, and looper-thread take-up means in cluding a movable member attached to the looper-lever between its fnlcrum and driven end and a stationary member, said members cooperatively acting upon the looper-thread to take care of slack therein.

6. In a sewing machine, the combination with a thread-carrying needle and driving connections therefor, of a looper-lever and driving connections therefor, a thread-carrying looper on said lever acting in its movement into the needle-thread loops to slacken the looper-thread, and looper-thread takeup means associated with said looper-lever and actuated thereby to take up the aforesaid slack of the looper-thread.

7. In a sewing machine, the combination with a thread-carrying needle and drivingr connections therefor, of a looper-lever and driving connections therefor, a thread-carrying looper on said lever acting by its movement into the needle-thread loops to slaclren the looper-thread, and looper-thread take-up means including a movable member attached to the looper-lever and a stationary member said members coperatively acting upon the looper-thread to take up the aforesaid slack therein.

In testimony whereof I have signed this specification.

GARRET B. OSTERHOU'I.

Copies of this patent may be obtained for ve cents each, by addressing the "Commissioner of Patents,

Washington, D. G. 

